Improvement in grooving-tools



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JOSEPH DILL, 4OF GRAND RAPIDS, .MICHIGAN Letters Patent No. 110,123, datedDecember 13, 1870.

IMPROVEMENT IN GROOVlNG-TOOLS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, J osEPHDrLL, of Grand Itapids, in the county of-Kent and State of Michigan, have invented a new and useful Improvement in Grooving- Tools; and I do hereby declare the following to be a full and correct description 'of the same sutcient to enable others skilledin the class to which my invention appertains to fully under-sand and use the same,

reference being had-'to the @accompanying drawing which makes part of this specitica'tion, and in which` Figure 1 is a side view of my improved groovingtool;

Figure 2 is a side elevation of several of the tools used together t o cut a wide groove Figure 3 is an end view of lig. 2 'and Figure 4 is an end view of the tool, showing a in odilicat-ion.

Like letters of rareuce indicate like parts in the several figures.`

AThe nature of my-invciition consists in construct-V ing a grooving-tool ofua. piece of suitable metal,v having at each end teeth cut iirthesame direction, the line ofthe edges of the teeth forming-segments of a circle, of which the length of tool is the diameter'.

In the center of the tool is formed au opening,

` made to fit ou the shaft or arbor on which it is to be used.

A, inthe drawing, represents my improved tool constructed of a suitable piece of metal, of equal width at each end, bui;L increasing in width toward the center, to allow of an opening, B, being made, which is of a size to it the shaft or arbor on which the tool is to be used. d

Each end of the .piece A is provided with teeth, C, cut i'n the same direction, the lille of the edges ofthe teethformng segments of a circle, of which the length of thc tool-is the diameter. Y

Any desired number of. these tools maybe placed on one shaft, `so as 'to eut a more or less wide groove.

rlhe rst great advantage ot" my tool is that, when several of them are used together, they may be placed on the shaft as shown in iig. 2, so that, although a groove is cut of a width equal to the combined thickness of the number of tools used, (see iig. 3,) yet but one saw-eilt is performed; that is to say, each tool has completed its cut before the next one begins to cut, thus requiring no more power than were but one saw use d.

Of course one saw could not'very well he made of sutlicient thickness to eut a groove say one ,inch wide, and two or three saws would have to be riveted together to do it.

Taking in consideration, not only the great labor of riveting together the saws, but the fact that, once riveted together they are useless 'for any other purpose but' for cutting a groove of that exact width, and the additional power required to drive themfthe advantage ot my tool will, be easily understood, for 1 n y tools may be made of varying thickness so as to provide for any width of groove.l

Another advantage of my tool is the facility .with whichthe teeth can be tiled and kept even. In order to do this it is but necessary to bring all the tools oir the shai't in line even with each other, when a tile passed between .the teeth'will file even all the teeth at neend of the tools, the saine operation repeated on the other end, xingthe teeth there. Were saws,

riveted together, used instead of4 my tools, the labor of filing the teeth even wonldbe infinitely more troublesome and tedious.v

Another advantage oi my invention 1s the perfect smoothness with which the groove is cut. As never more than one tool at the time cuts through the wood, the latter is not torn or splintered, as would be the case were they placed side by side even, as is necessarily the same Awith saws.

Another advantage of my invention is the cheapness with which it can be applied. Each tool replaces a complete saw, and as each tool can be made for about one tenth of' what the saw costs, and as a limited numbe'r of tools oi' different thickness will sut'- Iiceto produce grooves of any size, varying sometimes only one-sixteenth of an inch, while,`for the slightest variation in the width of the groove, a new set ot' saws would be required, and, as there. are certainsizes of grooves which could not possibly be produced by saws,

this advantage of my invent-ion will bc clearly understood.

In tig 4 I show a modification in the construction of the teeth, the edges ot' which may be beveled, so that, when the tool is placed on :u1 inclined shaft, it will cut out th edges of a dovetailed groove.

Having thus described my invention,

W hat I claim as new, and desire to secure by Letters Patent, isy v The grooving-tool A, constructed and operating substantially/as herein shown and described.

BENJAMIN A. WILLIS, H nNnY Wnr'rrnrrnn, JR. 

